View Larger Image March 15th, 1943 On March 15th, 1943, 1st Marine Raider Regiment was established on Espiritu Santo Island, New Hebrides Islands. The Regiment consisted of Headquarters, 1st, 2nd, 3rd, and 4th Raider Battalions. mster52017-07-10T13:53:27+00:00March 15th, 1943|